Sash-fastener.



F. N. CRANDELL.

SASH FASTENER.

APPLICATION FILED MAY 14, 1915.

awuemtoz El iot/mug UNITED STATES PATENT OFFICE.

FREDERICK N. ORANDELL, OF FULSHEAR, TEXAS.

SASH-FASTENER.

To all whom it may concern:

Be it known that I, FREDERIdi; N. CRAN- DELL, a citizen of the UnitedStates, residing at Fulshear, in the county of Fort Bend and State ofTexas, have invented certain new and useful Improvements inSash-Fasteners; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to fasteners for window sashes; and it consistsin the novel construction and combination of the parts hereinafter fullydescribed and claimed.

In the drawings, Figure 1 is a side view of a sash fastener constructedaccording to this invention. Fig. 2 is a plan view of the same.

The upper and lower window sashes 2 and 3,-portions of which are shown,are of any approved construction.

A washer plate 4 is secured to the lower sash 3 by means of ascrewthreaded eye-bolt 5, and a cam-shaped locking plate 6 is pivoted tothe eye of the eye-bolt. The eye-bolt has a rectangular eye so that thelocking plate cannot tip over sidewise. The outer cam surface of thelocking plate 6 is provided with serrations 7 for engaging with theupper sash 2. The inner end portion of the locking plate issubstantially concentric with its pivot and it is provided with teeth 8.

A stop-dog 10 is hinged to the. washer Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed May 14, 1915. Serial No. 28,050.

plate 4 by a pivot pin 12, and is arranged so that it engagesautomatically with the teeth 8 when the locking plate 6 is in con tactwith the upper sash. The stop-dog prevents the locking plate from movingupwardly, and it prevents anyone from raising the locking plate from theoutside of the window by inserting a knife blade between the Windowsashes.

When the locking plate is in engagement with the upper sash, as shown,it prevents the upper sash from being lowered and the lower sash frombeing raised, but it permits them to be slid in the reverse directions.

The locking plate and the stop-dog are both turned over backwardly ontheir pivots when the device is not required in operation.

What I claim is:

A sash fastener, comprising a washer plate, a single eye-bolt having arectangular eye and a screwthreaded .shank which engages with the upperpart of one sash, the washer plate being clamped to the sash by the saideye, a cam plate pivoted on the upper part of the eye and prevented fromtipping sidewise by its side portions, said cam plate being adapted toengage with the other sash and having serrations adjacent to its pivot,and a stop-dog hinged to one edge of the washer plate and engaging withthe said serrations.

In testimony whereof I have aflixed my signature.

' FREDERICK N. CRANDELL.

